Hi all, I had some ferric acid (FeCl3) and I made this pedal for my brother.
Recipe:
1 part Ferric acid (mine is 39%) + 1 part hot water (about 50ºC)
Transfer made with brandless yellow transfer paper, if you have press & peel, should be easier.
About 50 minutes submerged upside down.
I´m happy with the result so here it is: